diff --git a/emacs-bookmark.zsh b/emacs-bookmark.zsh
index 36f71a7..5809224 100644
--- a/emacs-bookmark.zsh
+++ b/emacs-bookmark.zsh
@@ -145,6 +145,7 @@ function bm {
     fi
 }
 function _bm {
+    (( "${CURRENT}" == 2 )) || return
     local arg="${(Q)words[${CURRENT}]}"
     if ! [[ "${arg}" == */* ]]; then
         for ((i = 1; i < ${#__bm_bookmark_cache}; i+=4)); do